Engine-muffler.



1,084,883. Patented Jan..20,1914.

` Flr/0 f /J i f' y l 9 E. HOLZWARTH. ENGINE MUFFLER.

APPLICATION FIL'ED MAY 20, 1913.

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mms Pneus MMM: wml-Num s c unirsi) STATES-@ATWT OFFICE,

EDWARD HoLzWAnfrmor MILLER, SOUTH DAKOTA..

.nnGI'NE-'MUFFLEL le-all whom imag concern: I

Be it known that L EDWARD HoLaxvAnTin-- a citizen of the United-States, resldmg at Miller, in `the count'yof Hand, State of j South Dakota, have' invented certain new and useful Improverfents in Engine'-Muf fiers; and. I do hereby declare the following to be a full', clear, ,and exact description of the invention, such as will enable 'others skilled in the art to which it appertains to 4make and use the same.

The present inventionrelates to certain novel and useful improvements in a muliier adapted-to; be 'connected with an engine for the purpose of silencing the noises produced by the explosive exhaust from the 'engine In carrying out my invention it `is'my purpose to provide a simple, compact and eflicient device of the class mentioned which is .designed particularly for use in connection with internal combustion engines from which the gaseous` exhaust is-exipelled with a. great deal of objectionable noise. p Y

A further object of my linnl'ention is the provision of a muffler formed of a series of connected sections,.the Walls of which' are exposed to the atmosphere, so that the exhaust gases which are designed to be passed in a zig zag path through the muffler are not only gradually reduced in pressure, but are also reduced in volume through cooling,

. so that such gases will be expelled noiselessly atv from the muiier.

Still a further objectot my invention is the provision ,of a mufller which is so constructed that the liability of the same becoining'choked or cloggedV with the products "ofcombustion lcarried along by the Vexhaust' gases is obviated, and furthermore, when necessary, my muffler may be easily and readily dismantled for the purpose of clean- A further object of my invention is to construct the muffler of relativelyfew parts,

are shown at m2.'

Specification of Letters Yatent; fPatentd 311. 20, 191.4. appncationied Mey 2o. 191s. seriali nel' 768,827. y

8 isI a `ertical longitudinal sectional view. Fig. 4. is a cross' sectional view taken on the-.line

The muffler is composed. of a series of 'in-.` terconmunicating sections, the front or inlet section of the device being indicated-,by

v '4f-t of Fig. 1 and looking in the direction of the arrows.

the letter m, the rear or discharge end sec'- tion by m', While the intermediate' sectionsv 'e5' Each yI nuilierv section" is ,formed of a peripheral band or ring 1, to the edges otivhich are secured thevoppositely disposed frusto conical Wallsl 2 and 3,`each Wallhaving a central opening 4 therein, the openings of all the 'Walls being arranged in alinement When the muliler is assembled'. To 'connect the muffler sections together, each wall 2, except the Wall 2 of the front section m, is formed with a circular fla-nge 5, which is VU-shaped in cross section and surrounds the opening 4, the groove 6 o'-each of such flanges being designed to receive and seat the circular ange v7, surrounding the opening 4 of the abutting Wall 3 ofthe adjacentsecton of the muffler. The Wall 2 of the front section m isl provided with a collarl 8 surrounding the opening 4, this coll lar constituting a means for attaching the exhaust pipe E of theen'gine to themuilex'. The Wall' of the rear end section m has attached thereto a discharge pipe 9 `Which' communicates with the opening t of such Wall and through which pipe the exhausty gases Yescape vfrom the muffler. The Wall. 2 of the front section m of vthe device is further formed with a series of spaced perforatedears 1,0 extending fromthe periphery thereof, these ears alining with similarly arranged perforated ears 11 onthe wall 3 of the rear section mf of the muiiier.

Longitudinally arranged connecting rods 12 extend between and are carried by these ears, these rods being fastened by nuts 13. It will thus be seen that all the sections of the muffler are securely held in assembled relation. ln order 4to cause the bodyl of -gases to take a staggered or zig Zag path through'the muiiler, thereby separating or breaking up the gaseous column entering the muliler through the pipe E, I provide each section with aI vertically dispOS'ed-Q'ni- .Calbaiiing plate 14,. Which is held spaced apart from the Walls and peripheral ring'-,

gif its sections by means of a recessot spaced lugs 15 which extend inward fromV the'ring 1 ofthesection and are secured at their inner ends to the peripheral. edge of the muitier plate.. It Will'thus be seen that .a circular passage for the gases is formed1 between the edge of each'baitle-plate and the. adjacent ring l .of the section containing suchA plate.

From the above description of the me- .chanical -features of my invention, taken in 'connection With the accompanying drawings, the construction and operation 'of my improved device- Will be readily-apparent..

the muffler and are broken up and directed are then directed toward the apex of .the ba'lie plate in the nextsections .by the rear frusto'conical Wall 3 of thefirst section, the gases .passing into the second section of the muiier through the openings 4, Where such gases strike the apexof the conical baffle.

late of such second section. and are then `irectedoutward overthep'eripheral edge fof the.. plate and thence downward again lto the. next'section. Thiscontinues until' the gases passoutthrough the-discharge open 'ing 9 of themuliier as-Will be readily apparent. It will thus ,be seen that on account of thezig zag' lplath which the gases: are Aobliged to take t rough the muti-ler by rea.-

` "son ofth'e'shape of the 'Walls of the muiller reduced until such gases pass silently through the discharge 9;.. Furthermore it sections and Vthe v'baffle plate therein, `the velocityor pressure 'of the gases is gradually 1 will be noted that thewallsof the muffler vare exposed :in direct. contact Withtlie outer atmosphere instead of being incased as is usually .the practice so that the gasesA are cooledA in their passage throughthe muffler and are consequently. reduced in4 volume as well as in velocity. 4

`While Ihave-herein shown and described i i -one particular embodiment of my. invention,

I wish it to be understood that I do not con- Copies of this patent Amay be obtained for fine myself to all the pi cise details of coiistruction herein set forth byway of illustration, as modification and variationinay be made Without departing vitrom the spirit of the invention or exceeding the scope ot'v .the appended claims.v

lVhat Iclaim is: a 1 1. In a muiiler, the 'combination of a series ot' communicating hollow sections, each Section comprising a ring member, and a pair of oppositely disposed frusto conical Walls connected with the ring member, said Wal-ls,

having central alining openings therein, and aconical baffle plate within each sectionand connected spaced apart to the ring thereof.

2. In a muflicr, the combination of a series of communicating sections, each section in- .cluding a.r1ng member and a pair of opponected with the ring section, said walls hav-l ing alining openings in the center thereof, a

series of spaced lugs proJecting inwardfrom the ring of each section, a conical bathe plate supported by said 'lugs in lspaced relation to the ring, an inlet at one end of s aidmuiiler and an outlet at the opposite end'thereof.

sitely disposed frusto conical Walls con- 3. In a muiller, the combination ofholloW end sections and hollow intermediate sections, the Wallsof said sections having centrai alining openings therein, .the Walls of one section interlocking at their inner edges l with the walls ofthe adjacent sections, a

conical baille plate located Within 4each sec` tion and held spaced apart from the Walls thereof, theapex of each baille plate extendingin'opposition tothe pathofthe gases through 'the muiiier, a gas inlet leading to one of the" end sections, a gas outlet `leading from the other end' section and binding means connecting the two end sections together.;

In testimony whereof, I ahx my signature, in the presence 'of two. Witnesses.

BERTHA. HoLzWAR'rH.

veleents each, by addressing the Commissioner of Patents, Washington, D. C. 

